Update the CSS to avoid hiding the save and reboot button

src/css/main.css

@@ -1001,7 +1001,7 @@ li.active .ic_mag {
 #content {
     margin-top: 0;
     padding: 0;
-    height: calc(100% - 145px);
+    height: calc(100% - 150px);
     /*  (port picker 105px, log CLOSED 25px, status bar: 20px + padding) - was: calc(100% - 171px)*/
     background-color: white;
     overflow-x: hidden;
@@ -1644,7 +1644,7 @@ dialog {
 .tab-setup, .tab-landing, .tab-adjustments, .tab-auxiliary, .tab-cli, .tab-configuration, .tab-failsafe, .tab-onboard_logging,
 .tab-firmware_flasher, .tab-gps, .tab-magnetometer, .tab-help, .tab-led-strip, .tab-logging, .tab-modes, .tab-motors, .tab-pid_tuning,
 .tab-ports, .tab-receiver, .tab-sensors, .tab-servos, .tab-osd, .tab-calibration, .tab-ez_tune {
-    height: 100%;
+    height: calc(100% - 51px);
     position: relative;
 }